IWR1642: IWR1642 SRR example - increasing sensitivity @ 80m+

Part Number:IWR1642

Hi, 

Using the SRR example I would like to increase sensitivity @ 80m range. 

So far I have lowered the SUBFRAME_SRR_MIN_SNR_dB parameter in the DSS project dss_main, as well as included the 120m chirp (uncommented #define SRR_RANGE_120m in srr_config_consts.h).

Is this the correct approach or should I be doing something else as well ? 

Thanks.